Huns Invasion? I Start with 30,000 Krigs!

[Explosive Soldiers + Technology + Global Struggle + Dimensionality Reduction Strike] Qin Feng traveled to a world similar to the late Han Dynasty. He had no soldiers or food and was sent to the border to fight against the invasion of the barbarians. The good news is that you are royalty! The bad news is that he is a remnant of the previous dynasty, and his father just died, making him a complete orphan! Sitting on the throne is his uncle, who wants to wipe out his old Qin family. Then Qin Feng has the standard golden finger. The good news is that he got a newbie gift package and got the Krieg Death Corps with 30,000 US troops, which can use light guns to shoot down all kinds of people in the feudal dynasty. The bad news is that there may be something going on with the four subspace vendors...